matt benner

Hi, I have observed some of my sleep data using the Sleepyhead Software - this from an Airsense 10 data card. I have found something that confuses me a little: For example, Under the events tab and when it prints a report for me it show for example that I went to sleep at 2130...however the charts are showing it more like 2230 with a little hash to the left - and when I mouse over to this hash just ot the left of 2230 it shows 2130? Which is the accurate time I went to sleep? 2130 or was it 2230?...